Edward dart



(No Model.)

B. DART. ARTIFICIAL STONE BLOGK PAV'IEZIILIEIIT.

No. 421,560. Patented-Feb.-l8, 1890.

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- embedded therein.

UNITED STAT S PATENT. OFFIcE.

EDWARD DART, OF NEIV YORK, N. Y., ASSIGNOR TO FRANKLIN HAINES,

OF SAME PLACE.

ARTIFICIAL-STONE BLOCK PAVEMENT.

SPECIFICATION forming part of Letters Patent No. 421,560, dated February18, 1890.

Application filed May 29, 1839- Serial No. 312,537. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD DART, aciti- -zen of the United States, and aresident of New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Artificial-StoneBlock Pavements, of which the following is a specification. 3

My invention relates to an improvement in artificial-stone blocks forpavements, the object of the same being to provide apavement havingembedded therein a binder of certain and peculiar construction whichshall adapt the pavement to withstand a much greater amount of pressureor strain than has heretofore been possible.

The distinctive novelty of my invention consists of a binder constructedof thin metallic plates or sections, either plain or corrugated orcoated with tar or other suitable material, and adapted to be locked orjoined at their ends in any convenient manner to form a frame orsupport, and having corrugations or indentures punched or otherwiseformed in one or both surfaces of the plate or plates and extendingpartially or entirely through the latter.

In the accompanying drawings, Figure 1 is a view in perspective of ablock or portion of a pavement, a portion of the upper surface and onecorner of the block being cut away to show the position of my improvedbinder Fig. 2 is a plan view of my improved binder, showing severalmeans of connecting the ends of the plates or secstances, and the upperor top layer of cement and crushed rock or stone. WVithin the up per andmiddle layers is located the binder D, constructed of one or more platesof flattened metal preferably from an inch to three inches in width andabout three-eighths of an inch in thickness, more or less, according to.

. gether by means of the angle-iron a, and in the upper right-handcorner of the same figure I have shown the plates secured together bymeans similar to a ball-and-socket joint, and in the lower left-han dcorner I have shown one end of the plate cut away and extending througha hole or opening formed in the end of the adjacent plate. I

. If the ball-and-socket joint should occur between the two parallelplates of the hinder or frame, I prefer to construct the plates, asshown in the lower view of Fig. 3, one end of theplate having the ballZ5 formed thereon, and the opposite end with the two curved armsorplates 0.

It will of course be understood that the frame may be constructed of anydesired number of parts, it being essential, however, that the endsthereof be joined or locked together. If desired, the binder may,especially when to be used in a cylindrical block or blocks of material,be formed of one piece circular in form, as shown in Fig. 4.. The metalplate or plates of which the binder is constructed are provided withindentures of any desired shape, a number of such being shown in Fig. 2,and which corrugations or indentures extend, preferably, a part waythrough the plate and from either one or both sides thereof. Instead,however, of punching or forming these indentures but part way through,they may extend entirely through the plate, as shown at d, Fig. 2, erepresenting an indentur'e formed with a round-pointed punch; f, formedwith a round fiat punch; g, formed with a square fiat punch; h, with asquare pointed punch, and i with a partially-rounded punch. In thelatter case I prefer that the opening be formed entirely through theplate in order that the cement or other substance or composition ofwhich the pavement is formed may pass through the opening in such plateand by means of the burr or barb formed on one side of the plate preventthe latter from any displacement when placed in position in the block ofpavement in which thebinder is to be embedded. These indentures formedin the plate or sections of the binder become filled with cement orother substance of which the pavement is composed and prevent anymovement whatever or displacen ient of the binder therein, the barb onthe opposite face of the plate, resulting from the indenture, alsoassisting in holding the plate in its proper position and against anymovement. Theseindentures are made but partially through the plate orsection of the binder, for the reason that in case an opening is form edentirely through the plate the cement or other substance in which theplate is embedded is liable to crack on each side or surface of theplate, leaving a small loose portion of the cement in and filling theopening formed in the plate, and thus affording no assistance inretaining the plate in its proper position, especially When any pressureor strain is brought to bear upon the surface of the pavement. This,however, is not the case when the plate is provided with the indcnturesabove described, the cement or other substance in such case filling theindentures formed in the plate on one side and surrounding the barb onthe opposite surface and virtually making the binder an integral part ofthe pavement itself.

I would have it understood that although I have described several meansof locking the ends of the plates together, I do not limit my claim tosuch means or forms of construction, but recommend them as being simpleand desirable. Other means will suggest them selves to persons who havea knowledge of the art; and, further, I do not limit myself to anyparticular shape, size, or number of indentures or corrugations, as aninfinite number and variety of such may be formed.

After the plates have been joined together and the frame completed, itwill be placed on edge in the position in which it is to be embedded,and the blocks or parts of the pavement formed and completed in anyconvenient manner. Any of the compositions availed of in theconstruction of artificial pavements may be used; but I contemplate,especially, the employment of cement, whereby the full value of thebinder and its functions may be secured.

If desired, the binder may be of such dimensions as to project outbeyond one or more sides of the block or slab for the purpose ofallowing it to be embedded in an adjacent block or blocks of the same orother material, to securely lock them together.

I do not intend by this application to cover, broadly, a binderconstructed of metal plates locked at their ends and set on edge, suchinvention being claimed by me in a former application filed May 1,1889,Serial No. 309,253; but

\Vhat I claim as my invention, and desire to secure by Letters Patent,is-

An artificial block or slab to be used as pavement or for other purpose,having embedded therein a binder or binders, each constructed of a thinmetallic plate or plates joined together, an (1 having indentu resformed through or partially through the same, the binder when inposition being placed on edge.

Signed at New York, in the county of New York and State of New York,this 22d day of May, A. D. 1889.

EDlVARD DAR/l.

\Vitness es:

GEORGE Coon, HERMAN Gnsrovv.

